TI 的 UC3843 是一款 具有 8.4V/7.6V UVLO 和 100% 占空比、温度范围为 0°C 至 70°C 的单端 500KHz 电流模式 PWM 控制器。 查找参数、订购和质量信息.

UMW(友台半导体) UC3843B参数名称：工作电压：7.6V~30V；开关频率：52kHz；50kHz；最大占空比：97%；拓扑结构：反激式；升压式；工作温度：0℃~+70℃@(TA)。 下载UC3843B中文资料、引脚图、Datasheet数据手册，有AC-DC控制器和稳压器详细引脚图及功能的应用电路图电 …

UC3843B Product details DESCRIPTION The UC384xB family of control ICs provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count.

Internally implemented circuits include a trimmed oscillator for precise DUTY CYCLE CONTROL under voltage lockout featuring start-up current less than 0.5mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control, and a totem pole output sta...

TI’s UC3843 is a Single ended 500KHz current mode PWM controller with 8.4V/7.6V UVLO 100% duty cycle, 0C to 70C. Find parameters, ordering and quality information.

Internally implemented circuits include a trimmed oscillator for precise DUTY CYCLE CONTROL under voltage lockout featuring start-up current less than 0.5mA, a precision reference …

olds for the UC3843B and UC3845B are 8.5 V and 7.9 V. The UC3842B and UC3843B can operate to duty cycles approaching 100%. A range of the zero to < 50 % is obtained by the UC3844B and UC3845B by the addition of an internal toggle flip flop which blanks the output off every other clock cycle.

2023年4月30日 · UC3843是一款具有内部固定频率电流模式的 PWM 控制芯片，广泛应用于开关电源、电源稳压、电流模式反激电路等领域。 本文将详细介绍UC3843 PWM控制芯片的各个引脚功能，并举例介绍3个典型的应用电路。 UC3843是一款具有内部固定频率电流模式的PWM控制芯片，工作频率在50kHz至100kHz之间，采用8引脚小型 DIP 封装。 该芯片具有高度集成度，可实现高性能的开关电源控制。 其优点有：低电源电流（启动电流1.0mA，工作电流500μA），内置频 …

The UC3842B, UC3843B series are high performance fixed frequency current mode controllers. They are specifically designed for Off−Line and DC−DC converter applications offering the designer. a cost−effective solution with minimal external components.

UC3842B、UC3843B 系列为高性能固定频率电流模式控制器。 此类器件专门针对离线和 DC-DC 转换器应用而设计，为设计人员提供了外部部件极少的成本高效方案。 这些集成电路具有实现精确占空比控制的微调振荡器、温度补偿参考、高增益误差放大器、电流传感比较器和高电流图腾柱输出，适用于驱动功率 MOSFET。 还包括了保护功能，包括输入和参考欠压锁定且全部带有迟滞、按周期电流限制、可编程输出停滞时间和用于单脉冲计量的锁存。 此类器件采用 8 引脚双列 …